What is the significance of splicing junctions in the process of gene expression?

Splicing junctions are important in gene expression because they help remove non-coding regions called introns from the messenger RNA (mRNA) molecule. This process, known as splicing, allows only the coding regions called exons to be joined together, forming a mature mRNA that can be translated into proteins. This ensures that the correct proteins are produced by the cell, playing a crucial role in regulating gene expression and ultimately determining the function of the cell.